@article{GDZPPN002442264,
title = {Critical Riemannian 4-manifolds.},
journal = {Mathematische Zeitschrift},
volume = {212},
year = {1993},
pages = {601-626},
zbl = {0801.53030},
url = {http://dml.mathdoc.fr/item/GDZPPN002442264}
}
Chang, Shun-Cheng. Critical Riemannian 4-manifolds.. Mathematische Zeitschrift, Tome 212 (1993) pp. 601-626. http://gdmltest.u-ga.fr/item/GDZPPN002442264/